need a manual instruction for a fairbanks manual no tranbreak valve bodie th-400

hi, my name is bob and i am searching for the manual instruction for the FAIBANKS aluminum manual valve bodie no tranbreak for a th-400,
i bought this transmission used and i rebuild it for about 4 times rebuildit in the stock way, allways the first ring of the oil pump broken or the bodie weared where the 1st ring are, and then a broken ring,
DOES ANY ONE KNOW WHERE CAN I FIND THIS MANUAL INSTRUCTION ??